feat(agents): add Goose AI agent support (#2015)

* feat(integrations): add YamlIntegration base class for YAML recipe agents

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* feat(integrations): add Goose integration subpackage with YAML recipe support

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* feat(integrations): register GooseIntegration in the integration registry

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* feat(agents): add YAML format support to CommandRegistrar for extension/preset commands

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* feat(scripts): add goose agent type to bash update-agent-context script

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* feat(scripts): add goose agent type to PowerShell update-agent-context script

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* docs(agents): add Goose to supported agents table and integration notes

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* docs(readme): add Goose to supported agents table

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* test(integrations): add YamlIntegrationTests base mixin for YAML agent testing

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* test(integrations): add Goose integration tests

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* test(consistency): add Goose consistency checks for config, registrar, and scripts

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* docs(agents): move Goose to YAML Format section in Command File Formats

Goose uses YAML recipes, not Markdown. Remove it from the Markdown Format
list and add a dedicated YAML Format subsection with a representative
recipe example showing prompt: | and {{args}} placeholders.

* refactor(agents): delegate render_yaml_command to YamlIntegration

Remove the duplicate header dict, yaml.safe_dump call, body indentation,
and _human_title logic from CommandRegistrar.render_yaml_command(). Delegate
to YamlIntegration._render_yaml() and _human_title() so YAML recipe output
stays consistent across the init-time generation and command-registration
code paths.

* fix(agents): guard alias output path against directory traversal

Validate that alias_file resolves within commands_dir before writing.
Uses the same resolve().relative_to() pattern already established in
extensions.py for ZIP path containment checks.

* docs(agents): add Goose to Multi-Agent Support comment list in update-agent-context.sh

* fix(agents): add goose to print_summary Usage line in bash context script

The print_summary() function listed all supported agents in its Usage
output but omitted goose, making it inconsistent with the header docs
and the error message in update_specific_agent().

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): add goose to Print-Summary Usage line in PowerShell context script

The Print-Summary function listed all supported agents in its Usage
output but omitted goose, making it inconsistent with the ValidateSet
and the header documentation.

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): normalize description and title types in YamlIntegration.setup()

YAML frontmatter can contain non-string types (null, list, int).
Add isinstance checks matching TomlIntegration._extract_description()
to ensure Goose recipes always receive valid string fields.

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): validate shared script exists before exec in Goose bash wrapper

Add Forge-style check that the shared update-agent-context.sh is
present and executable, producing a clear error instead of a cryptic
shell exec failure when the shared script is missing.

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): validate shared script exists before invoke in Goose PowerShell wrapper

Add Forge-style Test-Path check that the shared update-agent-context.ps1
exists, producing a clear error instead of a cryptic PowerShell failure
when the shared script is missing.

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): normalize title and description types in render_yaml_command()

Extension/preset frontmatter can contain non-string types. Add
isinstance checks matching the normalization in YamlIntegration.setup()
so both code paths produce valid Goose recipe fields.

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(agents): replace $ARGUMENTS with arg_placeholder in process_template()

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* test(agents): assert $ARGUMENTS absent from generated YAML recipes

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* test(agents): assert $ARGUMENTS absent from generated TOML commands

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

* fix(tests): rewrite docstring to avoid embedded triple-quote in TOML test

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

---------

Signed-off-by: Furkan Köykıran <furkankoykiran@gmail.com>

src/specify_cli/integrations/__init__.py

@@ -36,6 +36,7 @@ def get_integration(key: str) -> IntegrationBase | None:
 
 # -- Register built-in integrations --------------------------------------
 
+
 def _register_builtins() -> None:
     """Register all built-in integrations.
 
@@ -58,6 +59,7 @@ def _register_builtins() -> None:
     from .forge import ForgeIntegration
     from .gemini import GeminiIntegration
     from .generic import GenericIntegration
+    from .goose import GooseIntegration
     from .iflow import IflowIntegration
     from .junie import JunieIntegration
     from .kilocode import KilocodeIntegration
@@ -87,6 +89,7 @@ def _register_builtins() -> None:
     _register(ForgeIntegration())
     _register(GeminiIntegration())
     _register(GenericIntegration())
+    _register(GooseIntegration())
     _register(IflowIntegration())
     _register(JunieIntegration())
     _register(KilocodeIntegration())